Core winding machine and method



1964 H. c. wEsTcoTT ETAL 3,162,391

com: WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet l I .Zizflemtors 1964 H. c. WESTCOTT 'ETAL 3,162,391

CORE WINDING MACHiNE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 2 H Il u J1 W MH H" W W W 65L? l ml w \l u n W U i W HHW WW "W 'HI i Dec. 22, 1964 H. c. WESTCOTT ETAL 2,

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 5 6.70 609 A \J W 5 I ,H, m m/ y 0 o 0 il I H! IIIHHH o men 1' 7 J flordlflesjcezif w 607 jgz 'c ard/f. d9.

' 1964 H. c. WESTCOTT ETAL 3,162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 4 1964 H. c. WESTCOTT ETAL 3,162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 5 @W M, mrw

D 1964 H. c. WESTCOTT ETAL 3,162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet s MI! 4 MM "mm Dec. 22, 1964 H. c. WESTCOTT ETAL 3,162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 7 v mm NNN.

QMWW

v 4 M E EYE i v 5 o QQM 5 1 EEEWWM YW QQ i I Q Q F N 1964 H. c. WESTCOTT ETAL $162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 8 Dec. 22, 1964 H. c. wEsTcoTT ETAL 3,162,391

CORE WINDING MACHINE AND METHOD Filed Jan. 25, 1961 9 Sheets-Sheet 9 447 70 whjw m" United States Patent C) 3,162,391 CORE WINDHN G MACHINE AND METHOD Horace Clifford Westcott, Lemont, and Richard M. Ryde, Oak Park, Ill, assignors to Hubbard and Company, Chicago, Ill, a corporation of Pennsylvania Filed Jan. 25, 1961, Ser. No. 84,805 6 Claims. (Cl. 24256.2)

This invention relates in general to a magnetic core circuit for a transformer or the like and in particular to a machine for automatically forming the magnetic core circuit.

In the co-pending application entitled Transformer Core Construction, filed on March 13, 1961, bearing the Serial No. 95,056 and assigned to the same assignee as the present invention, there has been taught how to provide a new and improved magnetic core circuit and said application should be consulted for the details of the disclosure. Inasmuch as core circuits of the type disclosed in the aforementioned co-pending application will find a great demand in the transformer field, it is very important that the cost of producing such magnetic core circuits be kept to a minimum and such i the object of this invention.

Briefly, in the invention a magnetic core circuit of a predetermined configuration is assembled by the machine from a continuous insulated strip of magnetic core material. The continuous strip of magnetic core material is evenly guided through the machine and while moving is cut in a predetermined manner and Wound tightly on a provided core form.

More specifically, in the illustrated embodiment of the invention, means are provided in the machine: to position a reel of magnetic core material; to automatically unwind the reel of magnetic core material and pass it through the machine; to guide the magnetic core material as it passes through the machine; to cut the magnetic core material as it passes through the machine in accordance with a predetermined program designed to enable a predetermined magnetic core circuit configuration to be wound on a magnetic core form; to further guide and center the cut core material as it continues through the machine; to wind the cut magnetic core material on a core form; and 'to insure that the cut mag netic core material is wound tightly on the core form.

The teachings of the invention will be more fully understood if the following is viewed in light of the drawings of which:

FIG. 1 is a plan view of a magnetic core winding machine embodying the features of the invention.

FIG. 2 is a side elevational view of the embodiment of the invention illustrated in FIG. 1.

FIG. 3 is an elevational view taken along the line 3-3 in FIG. 1.

FIG. 4 is a perspective view illustrating that portion of the machine illustrated in FIG. 1 at which the-magnetic core circuit is wound on a magnetic core form.

FIG. 5 is a perspective view similar to that of FIG. 4 with the exception that the core form is rotated.

FIG. 6 is a perspective view illustrating the portion of the machine illustrated in FIG. 1 at which the magnetic core circuit is wound on a magnetic core form and more specifically illustrating the drive mean through which the magnetic core circuit is tightly wound on the provided magnetic core.

FIG. 7 is a partly cut-away plan view illustrating the guide mechanism embodying the features of the invention that insures that a properly orientated magnetic core circuit is wound upon the provided magnetic core form.

FIG. 8 is an elevational view taken along the line 8--8 in FIG. 7.

3,162,391 Patented Dec. 22, 1964 "ice FIG. 9 is an elevational view taken along the line 9-9 in FIG. 7.

FIG. 10 is a fragmentary elevational view taken along the line 10-10 in FIG. 8.

' FIG.11 is a fragmentary elevational view of the embodiment of the invention illustrated in FIG. 7.

FIG. 12 is an elevational view taken along the line 12-12 in FIG. 1.

FIG. 13 is an enlarged and cross-sectional fragmentary view of a portion of the machine illustrated in FIG. 12.

FIG. 14 is a plan view taken along the line 1414 in FIG. 12.

FIG. 15 is a plan view of a particular magnetic core configuration which may be wound by the core winding machine illustrated in the drawings and embodying the features of the invention.

FIG. 16 is a cross-sectional view taken through the core illustrated in FIG. 15.

Referring now to the drawings and particularly to FIGS. 1 and 2, there is illustrated a machine embodying the features of the invention. Moving from right to left, as seen in FIGS. 1 and 2, there is illustrated the reel assembly 20, the edge guide assembly 30, the reel unwind mechanism and magnetic core strip material cutting assembly 40, the cut magnetic core guide assembly 50 and the winder assembly 60. The component parts in the machine are all mounted on a frame 70 comprised of appropriately welded or otherwise secured channel members. Drive means (not shown) are provided for all the appropriate component parts of the machine and the prime mover of the drive means is preferably an electric motor (not shown). The details of the drive means are not illustrated in the drawings inasmuch as the particular means utilized (but not shown) to provide the necessary drive means is not considered a part of the invention and can be supplied by anyone skilled in the art. Several air operated cylinders are utilized in the embodiment of the invention illustrated in the drawings as will be seen and these air operated cylinders may be purchased on the open market and the details do not involve any of the inventive concepts of this invention. Further control valves for these cylinders are also not shown, but here again these valves can be purchased on the open market and no inventive skill is required to properly position and connect these valves and such is left to the ordinary skilled mechanic.

A. reel of core material 22 comprised of a continuous strip of insulated magnetic core material is mounted on the reel assembly 20 and the leading edge of the magnetic core material is threaded through the initial edge guide assembly 30. A trough 32 is provided in the edge guide assembly 30 and the trough 32 has di mensions slightly exceeding the normal width dimensions of the continuous strip of insulated magnetic core material and thus acts to guide the continuous strip of magnetic core material into the reel unwind mechanism and magnetic core strip material cutting assembly 40. The reel unwind mechanism comprises a pair of pinch drive rollers 42. The plurality of pinch drive rollers 42 engage the continuous strip of magnetic material and unwind the continuous strip of magnetic material from the reel 22 and pull the strip of magnetic core material through the trough 32 in the edge guide assembly 30 and into the the reel unwind mechanism and magnetic core strip material cutting assembly 40 through the input guide rollers 43. After the machine is set up and as will be seen, input guide rollers 43 do not actively un Wind the reel 22 of magnetic core material, but act generally as guide rollers. The lower pinch drive roller 42, as viewed in FIGURE 2, is pivoted and moved into a cooperating relationship with the upper pinch roller V to enable the operating rotary cutters 415; 416. and 417,418 are positioned on opposite sides of the strip of r'nagnetic core material. The cooperating pairs of rotary cutters 415, 416

and 417, 418 positioned on opposite sidesbf the strip of magnetic core material are cammedso 'as to follow a predetermined pattern and can move towards one another or away from one another, respectively, in accordance with a predetermined pattern as will be more fully seen hereinafter.

The continuous strip of magnetic core material moves from the reel 22 through the edge guide assembly 30 and through the reel unwind mechanism and magnetic core strip material cutting assembly 40 at a regular constant speed and as deter-mined by the speed of rotation of the pinch drive rollers 42.; Therefore, the strip of magnetic core material-moves and is pushed out of the assembly 40 at a constant speed. However the particular core wound in the illustrated embodiment of the invention is substantially rectangular in plan and it iseasily understood that the winding of a strip of material on-a'rectangular form willnot provide a regular constant speed to the peripheral movement of the strip of material.

If, for example, the winder assembly 60 were pulling the strip of magnetic core material throughflthe entire machne, then the strip of magnetic core material would move through the machine in a staccato-type fashion and this would result in backlash, improper shearing, and the like. The pinch drive rollers 42 pullthe. strip of core material from the reel 22 through the edge guide'ass'embly 30'and the reel unwind mechanism and magnetic core strip material cutting assembly 40 and pushesgthe strip of core material out the other side as illustrated in FIG 2 and a sufficient quantity of magnetic core material. is allowed to accumulate in aloop 51 soas to adjust for the winding of the magnetic core material on the coreform' 61 in the winder assembly 60.- .The magnetic core mate rial in the illustrated embodiment of the invention is'cut 'on both edges in a predetermined manner, and therefore in order to insure thatthe'magnetic core circuit will be properly wound on the core form 61- in the winder. assembly '60, a' cut magnetic core guide assembly 50- is provided. I

' The cut magnetic core guide assembly 50 centers the strip of magnetic core material before the magnetic core materialis wound-on the core form 61'positioned in the.

be seen that the winder mechanism 60 is mounted on the frame 70 and the winder mechanism'60 comprises a pair of'rotatable and laterally shiftable core positioning'shafts .601 and 602, respectively. The core form positioning shafts 601 and '602 extend through, the fixed housings 603 and 504 respectively, into the driven rotatable bearing housings 605 and 606 respectively. The bearing "housings 605 and 606 are keyed'to the core form positioning shafts 601 and 602 so as to be rotatable in unison with the core form positioning shafts 601 and 602 and the bearing housings 605 and 606 aredriven by a sprocket and chain arrangement (the details of which are not fully shown).' The bearing housing 605 is driven by the sprocket,- chain arrangement 607'and 608 and the bearing housing 606 is driven by the sprocket, chain arrangement 609 and 610, respectively. The bearing housings605 and 606. are so connected to the core form positioning shafts 601 and 602 that the bearing housings 605 and 606 rotate in unison with the positioning shafts 601 and 602 respectively. However, the core form positioning shafts 601-and 602 maymove inwardly and outwardly relative to the bearing housings 605 and 606 respectively. The above may be readily accomplished by providing a longitudinal slot in the positioning "shafts 601 and 602 and by positioning a key elementin the bearing housings 605 and 606,;ther'eby allowing the positioning shafts 601 and 602 to move inwardly and outwardly with respectto the bearing housings 605 and 606 and to rotate in unison with respect to the bearing housings 605 and 606.

The core form positioning. shafts ,602 and 602.- may move in or out that is, 'towardsone another or away from one another, in response to the movement of the cause a resultant movement of the pressure-activated arm winder assembly 60. The leading edge of the-strip of magnetic core material is secured to the core form 61 in s wardly or outwardly within the bearinghousing 605.

- any convenient manner and thedrive means of'the core formingmachine is then energized. In responseto the energization of the drive means (not shown) the core form 61 rotates and begins to wind a magnetic core circuit upon itself; The winder assembly is .also provided with an air actuated magnetic core Wrap assembly 650.

The magnetic core wrapassembly 650' exerts a constant pressure on -theouter layer of the magnetic core" circuit position a1 provided cores formaround which a magnetic core. circuit is wound; to tightly wind the continuous strip of core material'aroundthe provided core form and nished magnetic core circuit-.to be re aldily removed fromithe winder mechanism 60.

f."Referring now detaii toFIGS. .3 through 6, it can the substantially square corners 'of the core form iThe.- machine can be better understood if some detaillis/ pressure-actuated arms 611 and 612, respectively. The pressure-actuated arms 611 and 612 may be formed-ins =t'egrally onthe'core-positioning shafts 601 and 602.. The

inward or outward movement of the pressure-actuated arms 61 1 and '612 causes the inward-or outward movement of the core form positioning arms 601 and 602 respectively. The pressure-actuated arm 611 is-moved inwardly and outwardly response to the positioning of the actuating arm 6l 3. The actuating arm 613 is pivoted at 614 on the pivot arm-615. The pivot arm 615 is pivoted on the frame structure ;about the pin 616 so as to permit the pressure-actuated-,arm611 to move inwardly'and outwardly within the bearing housing 605. The actuating arm 613 is moved responsiveto the position of-the pres,- sure. cylinder arm 619 of. the pressure-actuated cylinder 618. The'pressure cylinder arm 619 is secured to the activating arm 613 at the pin 620. Movement of the pressure cylinder arm 619 inwardly or-outwardly will 611. and consequently the core positioning. shaft 601 in- Simiiarly, the pressure-actuated arm 6121's moved inwardly and outwardly in response tothe movement of the actuating arm 621. The actuating anr'n'621 is pivoted at 622 on the pivot arm 623.. The pivot arm 623 .is

' pivoted on the framestructurefifi about the. pin 624 so as to permit the -pressure-actnated arm 612 to move .inwardl'y. and outwardly- Within the bearing housing 606.

L The actuating arm 621 is moved responsive tothe activation of the pressure cylinder 625. The pressure cylinder 625 is suitably.ailixedto' the frame=7 0 and isgprovided -with apressu're cylinderarm 626. The pressure cylinder =65. aboutpinj6'27. 'The jm ovement of-the pressure cylinder I arm .626 causes the inward oroutward'movement of the" QPressur-actuated arm612 thereby'determining the posi- J than of the core from positioning-shaft 602; i v

Initially the core in m"positioning shafts601andf602 "are in an openY'position as illustratediin FIGURES. A

mi 626is pivot'ablyattachedito the activating arm 621 core form is selected and the'core form positioning shafts 1601 and 602are' moved inwardlj ortowards one another y-aq ns' he .75.

V m rpressure cylinder 61,3; and 62-5, respectively. .A stop ring (not shown) is mounted within the bearing housing 606 and the stop ring (not shown) serves to limit the inward movement of the core positioning shaft 662 to thereby aid in the centering of the core form 61. The activating mechanism associated with the air pressure cylinder 625 is so designed to exert a force on the core positioning shaft 602 which exceeds the force exerted on the core positioning shaft 661 by the activating mechanism associated with the air pressure cylinder 618, thereby insuring the centering of the core form 61 by the stop ring (not shown) mounted within the bearing housing 606. In the illustrated embodiment of the in vention, the core positioning shaft 601 is provided with a substantially rectangular end piece 630 adapted to fit flush against the core form 61. The core positioning shaft 602 is provided with a somewhat I-shaped end 631, adapted to fit in and to secure the core form 61 tightly in place as is clearly evident in the drawings and especially FIGURES 4 and 5.

The core form 61 illustrated in the drawings is rectangular in configuration and, therefore, it can be appreciated that ordinarily it would be very d-ifljcult to tightly wind a continuous strip of magnetic core material on the core form 61 because of the non-regular motion of the rectangular core form 61 as it rotates and also because of the presence of corners on the core form 61.

In order to tightly wrap the magnetic core circuit on the core form 61, the magnetic core wrap assembly 650 is provided. The magnetic core Wrap assembly 650 is pivotally attached to the frame 70 as at 651, and the magnetic core wrap assembly 650 comprises a pair of longitudinal frame elements 652 and-653 interconnected by a pair of cross beams 654 and 655. The longitudinal frame elements are pivotably attached to the frame 76 at 651 and in any convenient manner. The upper end of the magnetic core wrap assembly 650 as viewed in the drawings has pivotab ly attached thereto a pair of substantially U-shaped secondary wrapping brackets 656. Positioned at the outer ends of the substantially U-shaped secondary wrapping bracket 656 are a pair of substantially U-shaped primary wrapping brackets 657 and a pair of substantially U-shaped primary wrapping brackets 658. Pivotably attached to each .leg of each pair of substantially U-shaped primary wrapping brackets. 657 and 653 are a pair of wrapping rollers bearing the designations 659, 664), 661 and 662, respectively. The magnetic core wrap assembly 650 is pivoted about the frame 70 at 651 by an air pressure cylinder 665 having extended therefrom a piston arm 666. The piston arm 666 is pivotably attached to the cross beam 656 as clearly indicated in FIGURE 6. The air pressure cylinder 665 is in turn mounted to the frame 76 in any convenient manner. The air pressure cylinder is so designed (the design not being a part of the invention) that a predetermined force is exerted on the cross beam 654 by the piston arm 666 of the air cylinder 665. This force exerted by the piston arm 666 tends to pivot the magnetic core wrap assembly 650 in a counter-clockwise direction as viewed in FIGS. 4 and 5.

The force exerted on the core wrap assembly 61) rotates the wrapping rollers 65%, 669, 661 and 662 respectively as far in a counter-clockwise direction, as viewed in FIGS. 4 and 5, aspossible. After the core form 61 has been positioned by the core positioning shafts 661 and 662 and air pressure cylinder 665 energized, the wrapping rollers 659, 661), 661 and 66?r respectively, will press against the core form 61 and in such a Way that each wrapping roller will tend to move counter-clockwise as far as possible and will thus exert a pressure on the core form 661 over a substantial area of the core form 61. The wrapping rollers 659, 663, 661 and 662 will therefore follow the surface of the core form 61 and due to the pressure exerted by the air pressure cylinder 665,

will tightly adhere to the surface of the core form 61.

The wrapping rollers will follow the contour of the core form 61 even around the edges of the core form 61 as can be clearly seen in FIG. 5. When the magnetic core circuit is being wrapped on core form 61, it can be seen that the wrapping rollers 659, 660, 661 and 662 respectively will exert a force over a substantial surface of the magnetic circuit and will insure that the magnetic core circuit being wrapped on the core form 61 will tightly adhere to the core form 61 and subsequent wrappings will tightly adhere to one another even in those areas wherein the magnetic circuit turns a corner.

Reel Unwind Mechanism and Magnetic Core Strip Material Cutting Assembly 40 The general functions of the reel unwind mechanism and magnetic core strip material cutting assembly 40 are to unwind the reel 22 and to continuously cut the strip of magnetic core material passing therethrough in accordance with a predetermined pattern. In the illustrated embodiment of the invention the magnetic core material passing through the reel unwind mechanism and magnetic core strip material cutting assembly 40 is cut in a manner so as to produce a magnetic core circuit of a substantially semi-circular configuration. FIGURE 15 schematically illustrates a plan view of one type of magnetic core circuit which may be Wound by use of the machine embodying the features of the invention. FIG. 16 illustrates the cross section of the type of magnetic core circuit illustrated in FIG. 15. It can be seen that the cross section is not entirely semi-circular inasmuch as there is a flattened inner end.

It should be realized at this time that the invention is not limited to the forming of magnetic circuits of the type illustrated in FIGS. 15 and 16 and that any reasonable pattern may be cut in the reel unwind mechanism and magnetic core strip material cutting assembly 40 although my aforementioned co-pending application has taught that the magnetic core circuit illustrated in FIGS. 15 and 16 has significant merit.

Referring to FIGS. 1 and 2, the reel unwind mechanism comprises a pair of pinch rollers 42 one of which is rigidly attached to a frame element 421 of the frame assembly 76. The other pinch roller 42 is pivotably attached to the frame assembly 76 andis pivotable into and out of operating position under the control of the pair of air pressure cylinders 4-4. The pair of pinch rollers 42 are driven by driving means (not shown) and merely serve the function of pulling the continuous strip of magnetic core material through the reel unwind mechanism and magnetic core strip material cutting assembly 40 at a constant and predetermined rate. It is believed that the ultimate details of the reel unwind mechanism may be supplied by any one skilled in the art and the mere statement of function would be sufiicient to enable one skilled in the art to provide an operative reel unwind mechanism suitable for operation in the machine embodying the features of the invention. v

The pinch rollers 43 illustrated in the drawings may perform the same function as the pinch rollers 42, however, in the disclosed embodiment of the invention it was found that the pinch rollers 43 need not be driving elements and they merely serve as guide rollers except when the continuous strip of magnetic core material is initially forced through the magnetic core strip material cutting assembly as will be more apparent later.

The magnetic core strip material cutting assembly is illustrated in FIGS. 1, 2, l2, l3 and 14 and the general functionthereof is to cut a continuous strip of magnetic core circuit material in a predetermined pattern.

In the embodiment of the invention illustrated in the drawings, a pair of cooperating cutting edges are positioned on each side of the continuous strip of magnetic circuit core material and the continuous strip of magnetic circuit core material is pulled through the cooperating cutting edges. Further, the pair of cooperating cutting edges positioned on each side of the continuous strip of magnetic circuit core material are adapted to move in v wardly and outwardly, that is, towards one another or able frame members 408 and 409 are slidably mounted on a pair. of parallel spaced shafts 410 and 411. The shafts 410 and 411 are rigidly fixed to the supporting brackets 401 and 402 by a plurality of machine bolts 413. r

Rigidly and removably afiixed to each of the slidable frame members 408 and 409 are two pairs of'coop'e'rating applies apositive biasingforce tothe pivotable drive arms 449' and 450 to help overcomethe initial or starting friction encountered by the pivotable drive arms 449 and p 450. This force is adjusted such that'initial movement of the pivotable drivear'ms 449'and 450. does not occur due to this force and only aids in and does not cause the initial movement of the pivotable. drive arms 449 and 450. Thereafter the air cylinder (not shown) aids in. but does not-control the movement ofthe pivotable drive arms 449 10 and 450 and the. movement of the pivotable drive arms 7 449 and 450 is controlled by the movement of the program drive plate 440; v .The magnetic core strip material cutting assembly is programmed in the illustrated embodiment of the invencutters 415, 416 and 417, 418, respectively." The cutters tion to cut the strip of magnetic core material passing 415, 416, 417 and 418 are removably securedto theslid- .therethrough such that amagnetic core circuit will be able frame members 408. and 409 by a plurality of mawound on the core form61 ofasubstantiallysemi-circuchine' nuts 429; Each machine nut 429 is affixed to a lar cross section; This-is accomplished by coupling the threaded portion provided on the main shaft of each of drive gear 447 of the magnetic, core strip material cutting the cutters 415, 416, 417 and 418,-respectively. assembly t -the drive. means of the core winder (not The slidably mounted frame members. 408 and.409,'

carrying the cooperating cutters 415, 416 and 417, 418,

respectively, are each secured to the slotted drive block members 430 and 431respe'ctively. The slotted drive block members 430 and 431 are secured to the slidable frame members 408 and 409. by a pair of machine bolts 432 and 433, respectively The slotted drive block members 430 and 431 are formed of two split halves each secured to the other by a pair of machine bolts 435 and 436 respectively thereby forming the two drive slots 437 2 11x1438. r

Positionedimmediately below the slotted drive blocks 430 and 431 as viewedin the. drawingsis'theprogram drive plate 440. The program drive plate 440 is someshown) such that thedrive gear 447 causesthe program drive plate 440 to move a distance equal to the thickness of the magnetic circuit core, material for. eachcomplete revolution of the core form 61. Assume that the pro- 5 gram drive plate 440 is driven in a downward direction 3 drive arms 449 and 4501 respectively to move in the slots 451 and 451' of the program drive plate .440 and the slots 437 and 438 of the drive blocks/430 'and' 431,.respectively, to thereby cause the slidable frames 408 and 409 to move away fromone anothen. The distance that the what wing shaped and is provided with a pair of .drive slidable'ffames; 498131141409 P Q -W Y from each other slots 451 and 451 and af-pair of internally. threadedat i determined y m nw the pregramdrive Plate tachments441 and 442. The program-driveplate 440 ,is: 402 the length the pi t e drive arms-.449 mount d o a thfe fled d i screw 443 di' ov d and 450. Therefore'inasmuch as the-distancethatthe back and, forth on the threaded drive screw 443 when I ipfogfamidlivrerplate 440 m v 1 1 revolution f h the threaded drive screw 443 isrotated. A pair'of bear- 4 Core form 61 ispknown q t e i e' 0f the ing housingsv 445 and 446-are secured to the frame struc within the bearing housing 445and446. Attached to one end of the threaded dpive'screw 443 is the rotatable drive sprocket 447 which isinturn driven by the central or main} drive means (not shown) of the machine.

The drive sprocket .447 is coupled to the drive'me'ans (not shown) rotating the core, positioning shafts 601' and 602. and the rotation of the drive sprocket 447 bears a direct relationship to the rotation of the core form 61.

The pitch of the threaded drive screw 443 and the threaded portions 441 and 442. of thefprogram drive plate 440 and the rotational speedfof. the drive means 447 are so; ar-

' .55 tia'lly semi-circular cross-section.

ranged that the program drive plate 440 moves a distance equal to the thickness of the strip of magnetic core m'a terial for'eachrevolution of the corefor m 61..

mounted to the frame structure 70 through the bearing termine thedesirable length of the pivotable cutter drive arms 449 and 450 and this lengthshould be equalto the 4 desired radius of thefmagnetic coreicircuit to be formed by themachine, Therefor'e, the width oftheleading edge of the cont'inuous strip of magnetic core material canbe easily compensated forby the proper initial angularsetting of the pivota'blecutter drive arms'449' and .450." It

should be understood'that'various rotary cutter program- FIGURE .13. is a 'more 'detailedyiew of the 'slidable franie408and its associatedgpair of cooperating cutters 415 and 416. An integrally ,formedsleeve member461- 'is'securely attached togtlie slidable frame 408 and an in- 0 "tegrally t ormed sleeve member"462 :i's secured to the slidableiframemember 409. The arry cutters 415, 416,

417 and 418 are mounted eccentric to. their main shafts brackets452 and453,respectively,bestillustratedinFIG. 4 5 vand I46 P fi Y b that h rotary 12 of the drawings] i I cutters can be readily resharpened'and thenthe clearance Rigidly attachedto the pivotable drive arins i449 and 65 re-established inasmuch. as the diameters f the knif 450 at the upper end thereof as .viewedin the-drawings -..bla s' S as knife blade 4 -Q ret y r 416 i 'are the program. drive pins-45s and.456,irespectively.f esrs a p g- 1 a The prograi'nfdrive pins 455 'and456 extend up th-rough j v T'e rotary cutter 416,;forfexample ;comprises. a par- "the drive slots 451 and 451'positionedirr'fthe'program tia lyithreaded mainshaft464:rigidlyjmounted to the drive plate "440 and'throughthe slots 437 andg438 posi- .70 'lslidable fra'me408iby a machine bolt.429,, an inner blade tione'd withinwthe slotted-drive blocks 430.;ai1d1431, 're'-. -hou'sing 468Lrigidlyatt'ached to themain'shaft 464. and

spectively, as canbe'bes'tseeninFIGS. 12 snare, g ,Anaircyli'nder (not shown) i'scoupled-through levers V and arms (not shown) ftq'fthel.bottom,.as viewed"in the fidrawi'ngs, fofthe pivotable'idi ive' arms. 449' ajn d 450 and"? thereby alsosecured fromlrelative movement withrespect Jto'the'slidable frame 408 by themachine bolt 429, and an outer blade, housing.469 adapted'torevolve aroundthe nner-housiug 468. :The innergbladehousing 4681s pro- 1 cut magnetic core material.

'vided with a plurality of oil retaining ridges 470. The outer blade housing 469 rotates about the inner blade housing 468 on a plurality of pressed-in roller bearings 471. The inner blade housing 458 is secured in a rotatable position with respect to the outer blade housing 469 by means of the inner blade housing end plate 472. The inner blade housing end plate 472 is secured to the inner blade housing 468 by a plurality of machine screws 473. The outer blade housing 469 includes the rotary knife 474 and the rotary knife stripper 475. The rotary cutter 418 is a twin of the rotary cutter 416 and the rotary cutters 415 and 417 are similar to the rotary cutter 416 with the exceptions that the rotary knives of the rotary cutters 415 and 417 are positioned on the inside, that is, closer to the slidable frames 40S and 409 than are the rotary cutters 416 and 418 and also the inner blade housings of the rotary cutters 415 and 417 are shorter than those of the rotary cutters 416 and 418 in order to properly position the cooperating rotary blades of the cooperating rotary cutters 415, 416 and 417, 418.

The Cut Magnetic Care Guide Assembly 50 FIGURE 1, 2 and 7 through 11 illustrate the cut magnetic core guide assembly 50. After the continuous strip of core material is cut in and pushed out of the reel unwind mechanism and magnetic core strip material cutting assembly 40, the cut strip of magnetic core material is wound on the core form 61 in a manner as previously described. The scrap from the continuous strip of magnetic core material is then fed to a scrap chopper (not shown) or otherwise disposed. It is apparent that if a magnetic core circuit is to be wound into any predetermined configuration, that the orientation of the core mate rial as it is wound on the core form 61 is very important. In other words, the strip of magnetic core material is not allowed to wander and this is essential when a magnetic core circuit of a substantially semi-circular configuration is desired to be wound on the core form 61. Any meandering or wandering of the strip of magnetic core material between the reel unwind mechanism and magnetic core strip material cutting assembly 40 and the winder assembly 60 will result in a distortion of the cross-section of the finished magnetic core circuit.

Inasmuch as the cutting of the continuous strip of magnetic core material occurs on both edges of the magnetic core material, difliculty is found in properly aligning the Therefore, there has been provided a cut magnetic core guide assembly 50 which insures the proper alignment and centering of the strip of cut magnetic core material.

First, however, it should be pointed out that the machine is in no way limited to the provision of magnetic core circuit which is wound from a cut continuous core of magnetic material wherein the cutting of the continuous core of magnetic material occurs along both edges of the magnetic core material.

More specifically, the cut magnetic core guide assembly 50 is attached to the frame structure 70 by a pair of substantially L-shaped brackets 501 and 502, as best seen in FIGS. 1 and 2. The continuous strip of magnetic core material is passed through the guide assembly 50 and the guide assembly 50 maintains the cut magnetic core material centered about a predetermined adjustable center line within the cut magnetic core guide assembly 50 itself.

The cut magnetic core guide assembly 50 comprises a guide assembly frame 505 comprising side plates 506 and 507. Fastened to the side plates 506 and 507 are a pair of mounting plates 508 and 509, each secured at one end of the side plates 506 and 507 by a plurality of machine screws. Mounted on the guide assembly frame 505 are a pair of magnetic core strip material restriction plates 510 and 511. g The restriction plates 510 and 511 are mounted on the guide ssembly frame 505 by a plurality of machine bolts 512. The plurality of machine bolts 512 are secured to a plurality of restriction plate mounting brackets 513 which are in turn secured to the guide assembly frame 505 by a plurality of machine bolts; The magnetic core strip material restriction plates 510 and 511 are spaced from one another approximately the distance equal to the thickness of the magnetic core strip material.

Afiixed to the guide assembly frame 505 are two pair of cooperating ratcheted strip guide arm 503 and 504, respectively, best illustrated in FIG. 7. The pair of cooperating ratcheted strip guide arms 503 are pivotably secured to an adjustable guide arm shaft 514 at the pivot points 515 and 516 respectively. Each of the pair of cooperating ratcheted strip guide arm 504 are pivotably afiixed to a adjustable guide arm shaft 517 at the pivot points 518 and 519, respectively. The adjustable guide arm shafts 514 and 517 are positioned below the restriction plates 510 and 511 as can be clearly seen in the drawings and particularly FIGS. 7 through 11. The adjustable guide arm shafts 514 and 517 are mounted to the guide assembly frame 505 in any convenient manner and the adjustable guide arm shafts 514 and 517 are threaded through their length and threaded apertures are provided in the side plates 506 and 507 in order that the adjustable guide shafts 514 and 517 may be moved back and forth across the width or narrower portion of the cut magnetic core guide assembly 50. A pair of adjustment wheels 520 and 521 are provided for the adjustable guide arm shafts 514 and 517 to manually adjust the position of the adjustable guide arm shafts 514 and 517. Each of the ratcheted strip guide arms 503 and 504 are provided with a strip guide roller 522 positioned at the ends of the ratcheted strip guide arms 503 and 504. The strip guide rollers 522 are pivotably secured to the guide arms 503 and 504 by a plurality of fixed rivet pins 523. As can be seen the ratcheted strip guide arms 503 and 504 extend past the front end 524 and rear end 525 of the magnetic core strip material restriction plates 510 and 511 and this is best illustrated in FIGS. 7 and 8. The pair of cooperating ratcheted strip guide arms 503 and 504 are so arranged as to be movable towards one another or away from one another so as to center the continuous strip of magnetic core material being transmitted through the cut magnetic core guide assembly 50. The cooperating ratcheted strip guide arm 503 and 504 are connected to an air cylinder 530. The pair of ratcheted strip guide arms 503 are pivotably attached to the air cylinder 530 at the pivot point 531. The pair of ratcheted strip guide arms 504 are pivotably attached to the air cylinder 530 at the pivot point 532. The air cylinder 530 is connected to a source of air pressure (not shown) and the piston arm 533 of the air cylinder 530 exerts a predetermined pressure or force on the pair of guide arms 503 through the pivot point 531 and inasmuch as the air cylinder 530 is free to move a force or reaction force is exerted on the pair of guide arm 504 through the pivot points 532. The action of the air cylinder 530 pushes the pair of guide arms 503 toward one another and the pair of guide arms 504 toward one another and this motion continues until a resistive force equal to the force exerted by the air cylinder 530 is encountered and this force will be the resistive force of the edges of the cut strip of magnetic core material being transmitted through the cut magnetic core guide assembly 50.

Also mounted on the guide assembly frame 505 are two pairs of air actuated tension rollers 535, 536 and 537, 538, respectively. The tension rollers 535, 536, 5.37 and 538 are operable into an open position and a closed position, and when in the closed position serve to help keep the continuous strip of magnetic core material taut as the continuous strip of cut magnetic core materialis pulled through the cut magnetic core guide assembly 50 by the winder assembly 60. The tension rollers 535 and 537 are rigidly fixed to the guideassembly frame 505 and are positioned in a pair of bearing housings 540 and .541,

respectively. The tension rollers 536. anda538 are operable from an open positionas shown in FIG. 8 to. a .closed position as shown in FIGS.'1Q and 11, and the tension rolle'rs 536 and 538 are moved from the open position to the closed position by apair of aireylinders 542 and 543, respectively. Theair cylinders 542 and 543 are supplied from a source of air pressure (notj shown) and may be manually controlled by any suitable control mechanism (not shown). p 7 5 Positioned on the magnetic core strip material restriction plate 510 vis an anti-backlash block assembly comprising the suhstantiallycylindrical anti-backlash air cylinder- 550." The anti-backlash air cylinder. 5543 is rigidly secured to the restriction plate 510 by the machine screws 43 are here used to force the continuousstrip of magnetic core material through the properly spacedrotary cutters 415, 416, 417 and'418 until the cut continuous strip of magnetic corernaterial is grippedby the pinch drive rollers 42.; Thereafter the guide, rollers/l3 are rendered inoperative by meansnot shownand vactionly as guide-rollers thereafter. I p v p 1 The cutters 415,416,417-1and418 best seen in- FIGS.

7 ,1 2 Iand lB are eccentrically'm'ounted'on their respective sure in contact with the top of the anti-backlash hard wooden-block piston 553 by adjusting means (not shown).

The' anti-backlash Wooden block piston 553 is preferably main shafts .463, 464, 465 and 466 andtherefore cooperating pairs of cutters 415, 416 'aiid 417, 418. respectively can be moved away from'one another or toward one another by rotating the main shaf-ts 463, 464, 465 and 466 in their associated movable frames 408 and 409, respectively. Thus itbecomes relatively simple to reposition the rotary cutters to a precise and predetermined spacing after the rotary cutters have been sharpened. The leading edge of the continuous strip of magnetic core material is driven between the cooperating cutters 415, 41 6, 417 and 418 composed of ahard wood, although other materials which I would not scratch the'insulation off the continuous strip of magnetic core material passing through the restriction" plates,510 and 511' can beused. r a V -f The purpose of providing the anti-backlash 'assembly. is to apply a drag to the continuous strip of magnetic core material, to keep the continuous strip of magnetic core -material tautas'it' passes through the cut magnetic are comparatively simple in construction. The edge guide assembly consists of a trestle-.like'structure supported at one end on the frame-structure 76 andjon the: other ,end by apair of supporting legs-3lz A pair of longitudinally extending angle members33 are positioned on the edge guide assembly Silto form a trough 32 through .fiore,'a'ssoon as the leading edge ofthestrip of magnetic corefmat'erial is drawn up to the pinch drive rollers .42,

"theppinch drive rollers are. then placed in an' operative position by manipulating theair cylinders'44. The drive means "(notshownfand which can be any'zconventional drive means, such as an electric motor primemover and associated chains andsprockets', is; then momentarily energized 'soithat' the leading portionxof the continuous strip of magnetic core material is pulled throughthe edge. guide assembly 30 and the reel unwind mechanism and magnetic V core strip material cutting assembly 40 by the action of v the pinchfldrive rollers 42; Afterfa' sufiiciently long strip which the vcontinuous strip of magnetic core material. is guided. The width dimensions of the trough 32 slightly exceed the width dimension of .the continuous'strip of magnetic core material and therefore. the edges. of the continuous strip' of rnagnetic core material arelorienteci by the channel members 33 forming-the troughfiZ.

'The reel assembly Ell-comprises a-supporting base 21 secured to the main frame structure 70 in any convenient manner, Positioned :on the main support 21 is the pair of upright supporting beams 23. The ree1'22 of magnetic core ,material is positioned in provided slots in the pair of upright supportingbearns 23 such that the reel 22 of magnetic-core material can freely-rotate in the supporting; '55

beams23.f I}

Y Operation I-ni ti'al ly,- a cfontinuous reelvof magnetic corelmaterial of magnetic'co're' material has been pulled through the last mentioned mechanismsto form the loop 51 shown in FIG. 2, the out continuous strip of magnetieicore material is then .threade'dithroug'lr the' cut magnetic core guide assembly and, finally,.secured tothecore form 61 in the-winder assembly hyianyconvenient means, such as insulating tape or providing a slottherefor in thecore form :61; or whatever. means is mostconvenient; a

Previous to the securing of the cut continuous strip of magnetic core material-toth'eicore form 61, the core form 61 itself is positioned in the winder assembly 60 by first actuating the air cylinders618, and 625. The actua- '-tion of the air cylinders. 618*and' 625will' move the core 'p'ositionin'g shafts 601 and 692 towards one-another. The .-core 61 may be heldinthe center manually .until the core is mounted place in the reel assembly 20. ,The par-" t-i'cula r configuration and arrangement of the reel assembly '20 is not essential tothepractice'of the'inve'n-tion, the only requirement being that a continuous 'strip 'of magnetic core materialfbe capable of being delivered frornthe reel. assembly "ZQQQ The leadingedge' of the continuous stripof magnetic core material is'then delivered to'thefedge 1 guide assemblyv latl wherein it passes through' and it; is guided the trough '32 of the edge'guide assembly 30. The' leading edge of 'thecontinuousgstrip of magnetic.

"core material is then deliveredt'ofthe reel.- unwind meek and m'agneti'c core 'strip material cutting assembly positioning shafts jolfiand" 602-,moveto the center and align with-one another, to securely position the core form "IAfter the leading edge of the' rnagnetiocore material has been secured to the'corezform 61', the air cylinder 530 invthe cut,}magnetic core guideassembly 50 is energized from 'a source? of air pressure v(iitatfshown) to} thereby I move the .n'pair of, ratchet strip guide arms 503 towards one another un'tilfthe stripgujideTollers 522 engage the -sides' of the cutifcontinuous magnetic* core material. MovernIe'nt; of the two pairs of ratcheted strip, guide arms 503 and' 504 will continue until thecut continuous strip ofmagnetic coreJmateriaLisjcenteredbetween the pairs of v ratcheted strip guide.'arins503 and 504,'-an d;i f necessary 1,:oneof "the ratcheted'jstrip guide arms 5031017. 5.04 will 'pushthe edge ofthecut' continuousstripgof magnetichcore -mat6rial over until the entirewidthic ify-the cutcontinuous 'strip of magnetic core mate'rial- -is centeredabetweenfthe pairs of; ratcheted:stripiguide'--arms 503-and-5114f 4 The positionzof the pairs-of ratchetedjstripguide 'armsfi 503and 50.4can ,be'adjusted, by. adjustingthe adjustable -guidearnishafts .514 and,517-byturning;-theadjustinent ejea'sai wheels 520 and 521, respectively. Therefore, shades of misalignment between the core form 61 and the cut continuous strip of magnetic core material can be compensated for by use of these adjustable guide arm shafts 514 and 517. After the cut continuous strip of magnetic core material has been properly aligned with the core form 61, the air pistons 54?. and 543 operatively associated with the tension rollers 536 and 538 may be energized from the source of air pressure (not shown) and the tension rollers 536 and 538 will move from an open position as shown in FIG. 8 to a closed position as shown in FIGS. 10 and 11. Thereafter, the magnetic core wrap assembly 650 is positioned in an operative position by energizing the air cylinder 665. The air cylinder 665 is energized from a source not shown.

Before the drive means (not shown) of the core forming machine are actuated to automatically form a magnetic core circuit, calculations must be made to determine the programming of the rotary cutters 415, 416, 417 and 418, respectively. In the embodiment of the invention illustrated in the drawings it has been decided to form a magnetic core circuit with a substantially semicircular cross-section. It can be noticed in FIG. 16 that the cross-section is not absolutely semi-circular, but is somewhat flattened at the inner end. This flattening is a practical compromise inasmuch as the apex of the semicircle would have zero width and therefore would be impractical to form. Therefore, the inner end of the magnetic core circuit formed by the core forming machine is somewhat flattened. The drive mechanism (not shown) is then adjusted such that for every revolution of the core form 61, the program drive plate 440 willbe moved a distance equal to the thickness of the continuous strip of magnetic core material. As was previously explained, the provision of the slots 451 and 451' and in the program drive plate 440 and the slots 438 and 437 in the drive blocks 431 and 430, respectively, enables the slidable frame supports 408 and 409 to move away from one another at such a rate that the end result or the configuration of the magnetic core circuit will be substantially semi-circular and will be of a configuration illustrated in FIGS. and 16.

Means such as the length of core winding indicator 80 schematically illustrated in FIG. 2 may be provided in the machine to automatically stop the machine after a predetermined magnetic core circuit has been wound upon the core form 61 as will be explained later. The pinch drive rollers 42 are activated as previously described to draw the continuous strip of magnetic core material through the edge guide assembly 30, through the guide rollers 43, through the cooperating rotary cutters 415, 416 and 417, 418, respectively, and push the cut core material out of the reel unwind mechanism and magnetic core strip material cutting assembly 40 into the loop 51 as illustrated in FIG. 2. The core form 61 is rotated I by the rotation of the core form positioning shafts 601 and 602 and the magnetic corewrap assembly 650 exerts a constant pressure on the continuous strip of magnetic core material as it is wound upon the core form 61. The magnetic core wrap assembly is constructed such that the continuous strip of magnetic core material is tightly pressed to the core from 61 and subsequent layers of the magnetic core material are tightly pressed to one another and the pivotability of the magnetic core wrap assembly rollers 659, 660, 661 and 662 enable the constant pressure to be applied to the continuous strip of magnetic core material being wrapped even when going around the corners of the core form 61, as is clearly illustrated in FIG. 5.

The motion of the cut continuous strip of magnetic core material after it emerges from the pinch rollers 42 is staccato-like in nature in that the peripheral speed of the continuous strip of magnetic core material changes the core form 61 is rectangular in configuration.

Til

depending upon the position of the core form 61 because Also,

14 the peripheral speed of the continuous strip of magnetic core material increases slowly because the periphery of the magnetic core circuit being formed is increasing and therefore the peripheral speed is increasing. The speed of the pinch drive rollers 42 is slowly increased by means (not shown) to maintain the size of loop 51 approximately the same at all times. Therefore, the build-up of the loop 51 adjacent the drive pinch rollers 42 enables the cutting of the continuous strip of magnetic core material to be smooth and even as it passes through the reel unwind mechanism and magnetic core strip cutting assembly 40 is constant. The staccato-type movement of the continuous strip of magnetic core material after it emerges from the driven pinch rollers 42 is adjusted for by enabling the loop 51 to be built up in the mechanism.

As the cut continuous strip of magnetic core material passes through the cut magnetic core guide assembly 50, the width of the continuous strip of magnetic core material increases. The pairs of ratcheted strip guide arms 593 and 5% move away from one another in response to the counter pressure exerted by the edges of the cut continuous strip of magnetic core material and must move in unison and therefore the cut strip of magnetic core material will be symmetrical about a chosen center line, and the center line is determined by the position of the adjustable guide arms shafts 514 and 517. Therefore, a symmetrical magnetic core circuit is provided.

The length of core winding indicator means schematically illustrated in FIG. 2 can be adjusted to automatically stop the machine after a predetermined magnetic core circuit has been wound upon the core form 61 as for eXamle by interrupting the energizing circuit of the prime mover (not shown) if, for example, the prime mover is an electric motor.

In a preferred embodiment of the invention a digital computer device which translates length or distance into a predetermined number of counts is utilized in the length of core winding indicator means 80. A transducer including the schematically illustrated roller 801 is located adjacent the tension roller 535 and rotates therewith. Means not shown, are provided in the digital computer device to reset the digital computer device to zero each time the core form 61 makes a full revolution. Initially a count corresponding to the desired perimeter of-the last turn of the magnetic core circuit is manually set in the digital computer device. As the, magnetic core circuit is being formed the length or perimeter of each winding on the magnetic core circuit is fed into the digital computer by means of the transducer (not shown) including the schematically illustrated roller When the length of the winding being wound on the magnetic core circuit approaches the preset count, means (not shown) can be provided to slow down the drive means (not shown) if desired. Finally, the length or perimeter of the winding being wound or the magnetic core circuit exceeds the preset length and means (not shown) provided in the length of core winding indicator 80 are provided to stop the machine.

Specific details of the length of core winding indicator 80 are not provided inasmuch as equipment is presently on the market to accomplish the manipulations necessary and to give the output or machine stop signal require without inventive adaptation of the equipment.

What has been described is considered to be the preferred embodiment of the invention. However, alterations, modifications, substitutions and the like, may be made without departing from the scope of the invention. Therefore, it is the intention that the claims appended hereto cover the entire inventive scope disclosed in the Y foregoing.

What is claimed is:

1. A machine for winding a magnetic core circuit comprising, a reel mechanism for delivering a continuous strip of magnetic core material, a rotary cutter assembly for continuously cutting said continuous strip of magnetic least two pair of rotary cutters spaced from one. another and adapted to'cut adjacent opposite edges of said continuous strip of magnetic core material, drive means for said continuous strip of magnetiecore material to pull .said continuous strip ofmagnetic core material from said reel, mechanism and through said rotary cutter assembly at a constant speed, awinder assembly for tightly wrap-- ping said cut continuous strip of magnetic corematenal on a provided core form, :a guidemechanism for orien- 'tating said cut continuous strip of magnetic core material e about a predetermined point before said out continuous strip of magnetic core material is w ound on said provided core form by said winder assembly, .said pairs of rotary cutters insaid rotary cutter assembly being mov able relative to one another, means for programming the relative movement of said pairs of said rotary cutters in said rotary cutterassembly responsive to the winding of said continuous strip of magnetic core material on said I provided core form, andv magnetic core circult length 1 means for determining the length of the final wrapping of said magnetic core circuit for interrupting the wrapping of said continuous strip of magnetic core material on said. provided core thereby enabling'said continuous strip of.

magnetic} core material'to be so cut that a magneticicore circuit of a predetermined configuration is wound on said provided core form by said winder assembly. a

2. A process for forming a magnetic. core circuit of a predeterminedconfiguration on a polygonal-shaped 'core form, comprising the steps of: providing a continuous strip of magnetic coremateriaLdeIiveiing said continuous strip of magnetic corematerial to a continuous cutter assembly at a constant speed, continuously cutting said'continuous strip ofv magnetic core material in said continuous cutter assembly, building up a loop of said continuous. strip of magnetic core material after said continuous strip of magnetic core material is cut in saidcontinuously-cuttingcutter assembly, delivering said continuous strip. of magnetic core material from said loop to a winder assemblygwinding j 1 said continuous strip of magnetic core material on said polygonal-shaped core form in;'said winder assembly, and

programming the cutting of said continuous strip of magnetic core material innsaid continuous, cutter-assembly in accordance with the, winding of saidcontinuou's, strip of said programdrive plate being adapted to'be moved.

magnetic corematerial in said winder'assembly; j

. 3. A mechanism. for continuously cutting afmoving strip of material comprising; a first movablerotarycutter frame having positioned thereon. a fir'stpair or 7cooperating rotary cutter blades, a second movable rotary cutter frame having positioned thereon: a second pair of cooperating rotary cutter blades, said'first-movable rotary cutter frame and said second movable rotary cut- 7 ter frame being movable toward one another and away 'from'one another, and means for programming. the movement of said first and said second movable rotary cut-f ter frameswhereby said. moving strip' of material can befcut by said-first pair of cooperating rotary cutter seconddrive block member, respectively, said first and second drive block members each having a slotrtherein,

said slot in ,said'firstQand second drive block members being substantially parallel saidi-first and secondlframes being connected to, a program drive plate having slots thereinextending transversely fofsaid slots in-said ffi'rst and I second :drive bloc-k members, said program drive plate being adaptednto be moved in .apd irection subw stantiall y parallel to 'saidfslots in isaid firstand second drive;. block rnemberswhereby said finesse-seems frame. I 7 members move toward. or away from cueandtherl:

7 4. A'machine for winding a magnetic coreicircuitcoin v -75 :prising, a reel mechanism for delivering a continuous strip of magnetic core material, a rotary cutter assembly 'for continuously cutting said continuous strip of magnetic corematerial, said rotary cutter assembly comprised of at least two pair 1 of rotary cutters spaced from one another and adapted to cut adjacent'opposite edges of said continuous strip of magnetic core material,

" a first guide means vfor guiding said continuous strip iof magnetic core material from said reel mechanism to said rotary cutter a'ssernblygcomprising a fixed trough having' width dimensions slightly exceeding the Width dimensions of said continuous strip of magnetic core material, drive means for said continuous strip of magnetic core material operable topull said-continuous strip of magnetic :core material from said reel mechanism and through said trough in said first guide means and through said rotary cutter assembly at a constant speed'to thereby cause said continuous strip of magnetic core material I -to be cut in said rotary cutter assembly by said pairs ot-rotary cutters, a winder assembly including a pivotal pressure element havingtwo spaced contact surfaces for engaging and for tightly wrapping the cut continuous strip of ma gnetic core material on 2. provided core form,

a secon'd'guide mechanism for orientating said cut continuous strip of magnetic core material about a-..predetermined point before said cut continuous strip of .magneticcore material is wound on said provided core form by said winder assembly, said pairs of rotary; cutters of ,saidrotary cutter assembly being. movable relative to one another, and means for programming the relative movementof. said pairsof said rotary cutters responsive to thewindingof said cut continuous strip of magnetic core materialin said winder assembly, one pair of rotary, cutters being mountedupon a first cutter frame and the otherqpair; of rotarycutt'ersbeing mounted upon a second cutter frame, said firstand second cutter frames being ,slidably mounted upon, apair of parallel spaced shaft members, said first and second cutter frames being secured-to, a first and second drive block member, re-

spectively, said. first and'second drive block members each having a slot tliereimsaid slots'in saiddrive block 7 members] being substantially parallel, ,said' firstand sec- 0nd cutter: frames-being connected to a program drive plate having slots-therein which extenditransversely'to said slots'in said first and'second drive block: members,

1 inLa-direction substantially parallelto; said slots in said drive program'memb'ers whereby said cutter frames are moved'towardcr away from one another.. I Y a 5.'A ,machine'for winding a magnetic core circuit comprising, a: reel mechanism for. delivering a continuous strip-ofmagnetic corematerial, a rotary cutter assembly for continuously cnttin'g said continuous strip, of

, magnetic core material, said rotary cutter assembly comprised of at least two P ifof rotary cutters spaced from one another and'adapted' cut adjacent opposite edges of vsaid.continuous;stri i f {magnetic coreniaterial, .a first guide means for guiding said continuous strip of rotary cutter; assembly comprising a fixed trough having width dirnensionsslightly exceeding the widthdirnensions I of said continuousstripl ofgrnagnetic core material, drive e V i I stripof magnetic core material operable-{to 'pullfs continuous strip of magnetic 6 5 core material fromsaid {reel mechanism and through said trough ins aid firstguide means-andrlthro ughfsaid i'rotary' cutt er assembly atga constant speed to'.thereby cause said continuouststrip ofi magnetic-.corejmaterial rotary cutters} a winder assembly includii g .apivotalpresof magneti c'core-[material on a provided 'core tiiorrn, a second guide mechanism-"fororientating -saidcut con tinuous strip of magnetic core material about a predemagnetic core. material 'frorn said reel mechanism ---t o said 'to ibej cut in said 'rotaryicutter assembly by said pairs of sure;clement havingttwo spaced contact-surfaces for en-v gagin'g and'fortightly wrapping the cut' continuous" strip termined point before said cut continuous strip of magnetic core material is wound on said provided core form by said winder assembly, said pairs of rotary cutters of said rotary cutter assembly being movable relative to one another, and means for programming the relative movement of said pairs of said rotary cutters responsive to the winding of said out continuous strip of magnetic core material in said winder assembly, one pair of rotary cutters being mounted upon a first cutter frame and the other pair of rotary cutters being mounted upon a second cutter frame, said first and second cutter frames being connected to a program drive plate whereby movement of said program drive plate moves said first and second cutter frames toward and away from one another, and means for driving said program drive plate, said means for driving said program drive plate also driving said winder assembly.

6. The machine of claim 4 wherein a second drive means is provided for the said winder assembly, said second drive means also driving said program drive plate.

References Cited in the file of this patent UNITED STATES PATENTS Gammeter Mar. 10, White May 20, Capo-cefalo Dec. 20, Peyton Oct. 17, Horstman et a1 Dec. 2, Cohen Ian. 5, Clayton Jan. 19, Weiss Apr. 12, Shaw Aug. 9, Waggoner Jan. 29, Rockhotf Apr. 8, I ones Mar. 16, Smith July 26, Cundifi et al. June 3, Herr J an. 13, Richardson Oct. 16, Knepshield Mar. 12, 

1. A MACHINE FOR WINDING A MAGNETIC CORE CIRCUIT COMPRISING, A REEL MECHANISM FOR DELIVERING A CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL, A ROTARY CUTTER ASSEMBLY FOR CONTINUOUSLY CUTTING SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL, SAID ROTARY CUTTER ASSEMBLY COMPRISED OF AT LEAST TWO PAIR OF ROTARY CUTTERS SPACED FROM ONE ANOTHER AND ADAPTED TO CUT ADJACENT OPPOSITE EDGES OF SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL, DRIVE MEANS FOR SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL TO PULL SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL FROM SAID REEL MECHANISM AND THROUGH SAID ROTARY CUTTER ASSEMBLY AT A CONSTANT SPEED, A WINDER ASSEMBLY FOR TIGHTLY WRAPPING SAID CUT CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL ON A PROVIDED CORE FORM, A GUIDE MECHANISM FOR ORIENTATING SAID CUT CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL ABOUT A PREDETERMINED POINT BEFORE SAID CUT CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL IS WOUND ON SAID PROVIDED CORE FORM BY SAID WINDER ASSEMBLY, SAID PAIRS OF ROTARY CUTTERS IN SAID ROTARY CUTTER ASSEMBLY BEING MOVABLE RELATIVE TO ONE ANOTHER, MEANS FOR PROGRAMMING THE RELATIVE MOVEMENT OF SAID PAIRS OF SAID ROTARY CUTTERS IN SAID ROTARY CUTTER ASSEMBLY RESPONSIVE TO THE WINDING OF SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL ON SAID PROVIDED CORE FORM, AND MAGNETIC CORE CIRCUIT LENGTH MEANS FOR DETERMINING THE LENGTH OF THE FINAL WRAPPING OF SAID MAGNETIC CORE CIRCUIT FOR INTERRUPTING THE WRAPPING OF SAID CONTINUOUS STRIP OF MAGNETIC CORE MATERIAL ON SAID PROVIDED CORE THEREBY ENABLING SAID CONTINOUOUS STRIP OF MAGNETIC CORE MATERIAL TO BE SO CUT THAT A MAGNETIC CORE CIRCUIT OF A PREDETERMINED CONFIGURATION IS WOUND ON SAID PROVIDED CORE FORM BY SAID WINDER ASSEMBLY. 